Printer&#39;s roller composition and method of making the same.



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chromate, and molasses in possessed byanv of the roller compositions heretorore employed.

T he rubber when used acts as an additional binder, adds tensile strength and toughness to the composition and prevents it from checking or cracking under climatic and temperature changes. But a small proportion of rubber is required for this purpose in this composition, as by the use of the specified ingredients and their mode of combination therubber thoroughly permeates-the'product and binds the particles together throughout the mass. It also coacts with the chromate as a moisture resistant.

I claim l. A roller composition formed from dextrin, glue or gelatin, glycerin, a chromate, and a solvent therefor adapted to act as a retardant to the setting of the mass.

A roller composition formed from dextrin ,glue or gelatin, glycerin, sodium dichromate, and a solvent therefor adapted to act as a retardant to the setting of the mass.

3. A roller composition formed from dextrin, glue or gelatin, glycerin, a ehromate, and molasses, the last acting as a solvent for the chromate and retardant to the setting of the mass.

4. A roller composition formed from dextrin, glue or gelatin, glycerin, sodium diquantity to act as n solvent for the dichromate and retardant to the setting of the mass. f

5. A roller composition formed from dextrin, glue or gelatin, glycerin, crude ruhber, and a chromatc dissolved in a retardant vehicle.

6. A roller composition formed from dextrin, glue or gelatin, glycerin, sodium dichromate dissolved in a retardant vehicle, and crude rubber. f

7. A roller composition formed from rlext-rin, glue or gelatin, glycerin, sodiuri `cli-g chromate, and a sufiicient amount of molasses to serve as a vehicle for the dichromate and a retardant to the setting of 'the mass.

S. T he herein described process of making a printing roller composition, which consists in dissolving glue or gelatin in glycerin and cooking the same to a desired degree, adding dextrin then incorporatlng therewith a chromato diz-'solved in a retarding vehicle.

9. The herein described process of making a printing roller composition, which consists in dif-solving glue or gelatin in glycerin and cooking the saine to a desired degree.- adding lexirin and cooking the mass, and then incorporating therewith dichromate of soda dissolved in a retarding vehicle.

l0. The heroin described process of making a printing roller composition, which consis-ts in dissolving glue or gelatin in glycerin and cooking the same to a desired degree, adding dextrin and cooking the mass, adding thereto crude rubber dissolved in a suitable solvent, heating the mass, and then adding thereto a chromate dissolved in a retarding vehicle.

11. The herein described ing a printing roller composi ion, 'hich consists in dissolving glue or gelatiriin glycerin and cooking the same to a desired degree, adding dextrin and cooking the mass, ad-ding thereto crude rubber dissolved in a suitable solvent., heating the mass, arid then adding thereto sodium dichromate dissolved in molasses.

In testimony whereof I aix my signature in presence of two Witnesses.

EDWVIN J. LARKIN.

rocess of mak- 'itne.- .ses

C. C. HINEs, BnNNE'rr S. JoNEs.

and cooking the mass, and 

